After a tooth is extracted, a socket is formed where the tooth used to be. This fossa will have an incision after the tooth is extracted, so blood will continue to flow out. Since platelets have a clotting effect, the blood that comes out will clot and form a blood clot. The clot is formed in the socket and has a very important role. Once the clot is formed, the hemostatic effect is achieved, the tooth wound will not bleed again, and infection will be prevented. Therefore, it is important not to get rid of the clot and not to brush or rinse your mouth for three days after the tooth extraction, because if the clot is accidentally removed, it may bleed again, and in serious cases, infection may occur. Normally, the blood clot will slowly internalize and disappear in the mouth, and the gum tissue will slowly grow out in about two months, which is normal.